Extracting ALL of the attachments from a mailing list

[Gerald Combs]

Before I start rolling my own solution, does anyone know of a utility or
collection of utilities that will

  1) Extract all of the MIME attachments from a mailing list archive,

  2) Extract the files from any archived (tar|zip|rar|...) attachments,

  3) Move each extracted file to a specific directory, renaming it if
     there's a naming collision, and

  4) Remove any duplicate files.